| Popis: |
Being sessile, plants are more vulnerable to diverse types of biotic and abiotic stresses. Many living organisms like fungi, bacteria, viruses, weeds, and insects are associated with biotic stresses, and abiotic stress is generally caused by environmental factors like drought, heavy metals, temperature shock, and salinity. Such stress leads to generation of excess reactive oxygen species within the plant cell and ultimately causes oxidative damage. Exactly in this scenario, glutathione (GSH) transporters come into play. GSH is a nonproteinaceous sulfur containing a thiol compound having an antioxidant nature. It is mainly synthesized in chloroplast, mitochondria, and cytosol but are transported to the other parts of the plant body and regulate certain important metabolic activities. Several GSH transporters have the ability to transport GSH from intercellular to intracellular space and vice-versa. A few GSH transporters have been reported to show some role in metabolic processes like detoxification of xenobiotics, transport of heavy metals, stress management, and long-distance transport of organic sulfur. However, the genes encoding GSH-specific transporters are largely unknown. In this chapter, the various roles of GSH transporters in plants under various biogenic and abiogenic stress conditions are discussed. |
